. Railway and locomotive engineering : a practical journal of railway motive power and rolling stock . he boiler tubes, making in all. Losses are by sparks, cinders, hotand unburned gases which go out of thestack, amount to 22 shovelsful (this iswhere the brick arch is of great use, forwithout it, 32 shovels would uselessly goout of the stack). Coal absorbed as heat bythe tubes is equivalent to shovels andthe way this figure is arrived at is shownin tlie table. Heat measured in shovels Shovels full of coal vary from 14 to 20lbs. and the average, 16 lbs., is a fair esti-mate to f
. Railway and locomotive engineering : a practical journal of railway motive power and rolling stock . he boiler tubes, making in all. Losses are by sparks, cinders, hotand unburned gases which go out of thestack, amount to 22 shovelsful (this iswhere the brick arch is of great use, forwithout it, 32 shovels would uselessly goout of the stack). Coal absorbed as heat bythe tubes is equivalent to shovels andthe way this figure is arrived at is shownin tlie table. Heat measured in shovels Shovels full of coal vary from 14 to 20lbs. and the average, 16 lbs., is a fair esti-mate to follow if the reader desires to gofurther into the subject and to find theweight of coal consumed. In Table No. 2the heat of steam is accounted for inshovels and the loss out of 100 shovels iseasily seen. It is so great that every legi-timate and scientific effort or appliance tolessen it is fiot only desirable but it is im-perative that t he locomotive shouldhave it. Table No. 2. Heat in Stcaiii Gkrn in 100 Shoiels of Coal .Shovels Where heat goes. Used. Exhaust steam 55* Air pump and radiation. 8. HEAT DIAGRAM, NO. 1, OF ENGINE WITH FEED WATER HEATER APPLIED. human hands if they are below that fig- which goes to the firebox and heats the Loss at stack 22 ure, say at 100 degs. Fahr. One can, under sheets is equal to about 27 shovels. Coal — those circumstances, warm ones hands at dropped in the ashpan is equal to a loss S5 Total the stove. of 2 shovels, and the coal absorbed in the 7 Useful work Heat is a measurable quantity, and the superheater equals about 7^ shovels. — unit employed is the amount required to Th^ ial^<^s a total of 100 shovelsful of 92 raise one pound of pure water through one <:<^^^- 8 Keclaimcd by degree on the Fahrenheit thermometer. Table No. 1. This unit is the or British Thcr- Hrat of Combustion in 100 Shovels of Total 100 the feed water mal Unit. The word British is used to Coal heater denote the fact that this unit is not based ^Vh
Size: 2769px × 903px
Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1900, booksubjectrailroa, bookyear1901
